VirtIO PCI Transport Support for NuttX #13433
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anchao
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Sep 14, 2024
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1. only support pci modern device; 2. need the pci controller support MSI/MSI-X; It has been verified based on virtio-rng and virtio-net. Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com> Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
…e_io_xxx Use IO api to access the io region Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
Follow the virtio spec, support the virtio pci Legacy Signed-off-by: wangyongrong <wangyongrong@xiaomi.com> Signed-off-by: andi <andi6@xiaomi.com> Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
Extrace common part of virtio pci modern and legacy to virtio-pci to reduce the duplicated code. Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
1. Some platforms do not support interrupt mode (PCI_MSI/MSIX), so add polling mode support, so these platforms can also use virtio-pci; 2. In some cases, we do not want to use the interrupt for virtio driver to avoid time jitter, so add the polling mode support; 3. If CONFIG_DRIVERS_VIRTIO_PCI_POLLING_PERIOD <= 0, interrupt mode. if CONFIG_DRIVERS_VIRTIO_PCI_POLLING_PERIOD > 0, polling mode. Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
Should assgin back the feature to the vdev->features Signed-off-by: wangyongrong <wangyongrong@xiaomi.com>
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Just rebase to fix the conflict. |
xiaoxiang781216
approved these changes
Sep 14, 2024
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Summary
VirtIO PCI Transport Support for NuttX.
Now NuttX can use already implemented virtio-drivers to driver the virtio-pci based virtio device without any modifications to the these drivers.
Impact
New feature, VirtIO-PCI-Transport
Testing
x86-64 with virtio-pci-net, virtio-pci-rng, virtio-pci-blk